Calculating machine



March 26, 1935. A. A. 'ovERBURY 1,995,434

CALGULATI'NG MACHINE Filed May 24, 1933 3 Sheets-Sheet 1 L OQQQ gfgbooOQQOBVQi goo INVENTOR b uStinH.Overbu/y Y gf i Jmh'omsv March 26, 1935. A. A. ovEREsURYY l CALCULATING MACHINE Filed May 24, 1935 I5 Sheets-Sheet 2 INVENToR ABL? fifi A .Ove/bury d@ ATTORNEY Patented Mar. 26, 1935 CALCULATING MACHINE Austin A. Overbury, West Orange, N. J., assigner to Monroe Calculating Machine Company, Orange, N. J., a corporation of Delaware Application May 24, 1933, Serial No. 672,546

, 3 Claims.

The invention has relation to calculating machines, and more particularly to means for storing a constant value, which may thereafter be repeatedly registered in the numeral wheels of the machine without further selective manipulation.

According to the invention, which consists in the novel construction and combination of parts, as set forth in the appended claims, the clearing or resetting pin related to each numeral wheel in which a constant is to be set is angularly adjustable relative to the Wheel, so that a resetting operation (normally active to zeroize) may locate the wheel in any predetermined position.

The constant, when registered in the numeral wheels, may be used in any one of a number of different calculative processes. For instance, my co-pending application Serial No. 634,297, led September 22, 1932, and entitled Calculating machines (issued as Patent No. 1,964,211, on June 26, 1934), discloses means whereby an amount registered in a portion of the product accumulator of a calculating machine may be used as a multiplier, to control the automatic determination of a product. The present invention, applied to such a machine, would provide a constant multiplier which could be used successively or alternately with other multipliers, as required. Again, U. S. Patent No. 1,860,490, issued on May 31, 1932, to E. F. Britten, Jr., and entitled Calculating machines, discloses means for eliminating unwanted decimals, by calculatingto the nearest higher order unit, involving the presetting of a decimal wheel to a registration of 5. By the use of the present invention this 5 could be set at will into any numeral wheel of a calculating machine.

The invention is shown as applied to a Monroe calculating machine, the zeroizing means of which is disclosed in U. S. Patent No. 1,275,119, issued on August 6, 1918 to F. S. Baldwin, and entitled Zero setting mechanism; while certain details of the drive control mechanism are shown in U. S. Patent to G. C. Chase No. 1,566,650, issued December 22, 1925 and entitled- Operating means for calculators. In the accompanying drawings illustrating invention:

Fig. 1 is a plan view of a calculating machine embodying the invention.

Fig. v2 is a left side elevation ofthe drivecontrol means, the Xnumeral wheel resetting means being shown in section.

Fig. 3 is a section taken immediately inside the casing plates, showing the resetting key and associated parts.

the

(Cl. 23S-144) Fig. 4 is a plan view of a series of numeral wheels and associated parts.

Fig. 5 is a detail section taken through the numeral Wheel and resetting shafts. Fig. 6 is an exploded perspective view of a numeral wheel and associated parts.

Fig.f '7 is a vertical section, taken through the keyboard.

Fig. 8 is a fragmentary sectional view of a spring locator device.

The calculating machine herein disclosed is of well known type, wherein amounts set up on the keyboard 18 (Figs. 1 and 7) and thereby. through bars 19 differentially set in actuators 5, will be transmitted, through intermediate gears 12 to the numeral wheels 13 of the register, upon rotation of the actuators by a hand crank or by an electric motor. The actuators may be rotated forwardly to register these amounts additively in the Wheels 13, or they may be rotated reversely to register the amounts subtractively. The register wheels 13 are mounted in a transversely shiftable carriage 2, whereby the denominational value of the amounts registered may be changed.

'Ihe numeral wheels 13, with their attached pinions, are loosely mounted upon a common supporting shaft 86 (Figs. 3, 4 and 5), being frictionally connected with collars 87, xed on said shaft, by means of spring locator devices 85 mounted in the collars (Fig. 8). The wheels are restored to zero registering position by rotation of shaft 86 and by movement of fingers 89 into the path of rotation of resetting pins 90 associated with the wheels 13. The fingers 89 are rocked into clearing position by movement ofthe supporting shaft 88 to which they are rigidly secured, this roclng of shaft 88 being accomplished by means of a cam 96 on shaft 86, engaging an arm 99 on shaft 88, and serving to rock the latter shaft upon rotation of shaft 86. All of this mechanism is of well known construction, and need not be further detailed.

In order that the wheels 13 may be reset to any desired registering position, during the operation which normally resets the wheels to zero, the resetting pin 90 is mounted in an annulus 39 rotatably supported upon the corresponding sleeve 8'1, and connected with' its'numeral wheel by means of a spring 40 (Fig. 6) attached to the numeral wheel and having its' opposite free ends in engagement with the internal teeth 41 of the annulus 39. As shown, spring 40 is mounted upon pins 14 connecting the numeral wheel with its pinion` (Fig. 6) .1 The spring 40 is superior to the spring locator 85,y so that upon rotation of shaft 86 and engagement of pin 90 by the finger 89, wheel 13 will be stopped, and locater 85 will be readjusted relatively to wheel 13. When, however, wheel 13 is driven through the gearing 12, finger 89 may be brought into the path of pin 90, whereupon the wheel being positively driven, spring 40 will yield, and pin 90 will be reset re1- atively to its numeral wheel, and particularly with relation to the tens transfer pin 9 thereof. The resetting pin will remain in its new relation until the gears 12 are rotated and the fingers 89 rocked into resetting position simultaneously. Meanwhile at each resetting operation, involving rota.- tion of shaft 86 and rocking of finger 89, the wheel will be brought into the same position in which it was left by movement of the gear 12 in the operation above-described. 4The setting of a constant into the Wheel 13 is therefore accomplished by setting the desired amount on a key 18, rocking resetting shaft 88, and operating the machine to rotate the gear 12 in accordance with, the amount selected. During this operation shaft 88 is held in rocked position by means of a key 42, having engagement at 43 with the arm 99. Preferably shaft 88 is rocked further by key 42 than it is rocked by cam 96, so that a hook portion 44 of finger 89 will be engaged with the pin 90 (standing in zero position) to hold the resetting pin stationary during a movement of the numeral wheel either forwardly or reversely. This provides for the insertion of a complemental value as a constant, should this be desired. In this case, the machine is of course driven reversely instead of forwardly while key 42 is held depressed.

Each of the wheels 13 may be provided with an annulus 39, etc., but it may be preferred to provide this constant mechanism in certain wheels 13 and not in others, in which case the remaining wheels would be provided with resetting pins fixed rigidly in the wheels, and acting invariably to reset them to zero. In this case, however, means should be provided for guarding against the rotation of a wheel 13 not equipped with constant mechanism, by the gear 12, while key 42 is held depressed. For this purpose the right handl wheels 13, lying in column with the keys 18 in the position shown in Fig. l, together with the next higher order wheel, to which a. tens transmission may occur, are each provided with constant mechanism, and further provision is made that the machine may not be operated with key 42 .depressed in any other position than that illustrated in full lines in Fig. 1, that is to say with carriage 2 in its extreme left hand position.

This means comprises an extension 45 of key 42 which, in the position of the carriage illustrated in Fig. 1 is inactive, but, upon movement of carriage 2 out of its left hand position will overlie one of a series of arms 275 (Figs: 1 and 3) secured upon a shaft 276, which shaft is further provided with an arm 277 (Fig. 2) overlying a trigger 31. When extension 45 overlies an arm 275, trigger 31 will be tripped upon depression of key 42, releasing a pawl 25 mounted upon an arm 24 so that said pawl will fall into engagement with a shoulder of a rock arm 22 connected by link 21 with an operating shaft of the machine. This engagement couples arm 24 to arm 22, and, upon operation of the machine, will carry the arm 24 against a stop 29, at the same time raising a cam extension 144 of arm 24 into contact with a pin 145 of clutch lever 111, to move said lever to disengaged position. Disengagement of clutch lever 111 from its cooperating part will act in well known manner to break the drive connection from the electric motor to the differential actuators and gears 12, preventing operation of the machine.

I claim:

1. In a device of the character described, the combination with a numeral wheel, means for positively rotating said wheel through predetermined degrees of movement, and means for frictionally rotating said wheel, of a carrier mounted coaxially with said wheel and provided with a pin, frictional connecting means between said carrier and said wheel, and a stop arm movable into the path of rotation of said pin.

2. In a device'of the character described, the combination with a numeral wheel, means for positively rotating said wheel, and means for frictionally rotating said wheel, of a carrier mounted coaxially with said Wheel and provided with a pin, frictional connecting means between said carrier and said wheel, a stop arm movable into the path of rotation of said pin, adjustment means between the frictional rotating means and said arm, and an adjustment key for said arm.

3. In a device of the character described, the combination with a numeral wheel, differential value setting keys, means for advancing said wheel in accordance with the key setting, and means for resetting said wheel including an adjustable element and means cooperating to adjust said element in accordance with a value transmitted from a set key to said wheel.

AUSTIN A. OVERBURY. 

